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(Solved): An estimate is needed of the mean acreage of farms in a certain city. A 95% confidence interval s ...



An estimate is needed of the mean acreage of farms in a certain city. A? 95% confidence interval should have a margin of error of 32 acres. A study ten years ago in this city had a sample standard deviation of 120 acres for farm size. Answer parts ?(a?) and ?(b?). a. About how large a sample of farms is? needed?



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